From 04137372dcfe0d7eba8545efd65b7f43b682bb71 Mon Sep 17 00:00:00 2001
From: Ayrton Munoz <ayrton@google.com>
Date: Wed, 3 Aug 2022 17:05:09 -0400
Subject: libbinder: Remove dependency on openssl for Trusty kernel

This modifies the trusty-specific OS.cpp to use the RNG
available in the trusty kernel instead of openssl when
TRUSTY_KERNEL_FD is defined.

Bug: 230134581
Test: build Trusty
Change-Id: Ic27406707a515882ca6340d6e8db81f3e2f9509d
---
 libs/binder/trusty/OS.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libs/binder/trusty/OS.cpp b/libs/binder/trusty/OS.cpp
index 187add4a7b..7c811b75e9 100644
--- a/libs/binder/trusty/OS.cpp
+++ b/libs/binder/trusty/OS.cpp
@@ -14,7 +14,11 @@
  * limitations under the License.
  */
 
+#if defined(TRUSTY_USERSPACE)
 #include <openssl/rand.h>
+#else
+#include <lib/rand/rand.h>
+#endif
 
 #include "../OS.h"
 
@@ -28,8 +32,13 @@ Result<void> setNonBlocking(android::base::borrowed_fd fd) {
 }
 
 status_t getRandomBytes(uint8_t* data, size_t size) {
+#if defined(TRUSTY_USERSPACE)
     int res = RAND_bytes(data, size);
     return res == 1 ? OK : UNKNOWN_ERROR;
+#else
+    int res = rand_get_bytes(data, size);
+    return res == 0 ? OK : UNKNOWN_ERROR;
+#endif // TRUSTY_USERSPACE
 }
 
 } // namespace android
-- 
cgit v1.2.3-59-g8ed1b